Evaporator



J. H. DAVIS.

EVAPORATOR.

APPLICATION FILED DEC.5, 1919.

1 87,840, Patented Aug 16, 1921.

2 SHEETS-SHEET 1.

IN VEN TOR.

J. H. DAVIS.

EVAPORATOR.

APPLICATION FILED DEC. 5. ms.

1,387,840. Patented Aug. 16,1921.

2 SHEETS-SHEET 2.

IN VEN TOR.

ATTORNEYS.

UNITED STATES J'OEN H. DAVIS, OF CHICAGO, ILLINOIS.

EVAPORATOR.

Specification of Letters Patent.

Patented Aug. 16', 1921.

Application filed December 5, 1919. Serial No. 342,763.

To aZZ whom it may concern:

Be it known that I, J 015m H. DAVIS, a citizen of the United States of America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Evaporators, of: which the following is a specification.

The main objects of this invention are to provide an improved form of apparatus especially adapted for purifying water by distillation; to provide an improved form and arrangement of the parts of such apparatus whereby it may be simultaneously used for purifying water and cooking liquid food; to provide an improved form and arrangement of the parts of the evaporator; and to provide an improved form of con- (lensing chamber.

An illustrative embodiment of the invention is shown in the accompanying drawings, in which Figure 1 is a side elevation, partly in section, of the improved apparatus, showing certain parts supported on a gas stove.

Fig. 2 is a horizontal section of the evaporating receptacle, taken on the line 2-2 of Fi 1.

Fig. 3 is a horizontal section of the con densing receptacle taken on the line 33 of Fig. 1, with the top plate of the condensing chamber removed for the sake of clearness.

The present invention relates to an improved form of evaporator and generator which comprises an outer receptacle 1n which is suspended a battery of evaporating pans which are spaced one above the other. The pans are also spaced from the bottom, top and side walls of the receptacle so that the receptacle and pans are each adapted to contain water to be evaporated. The outer receptacle is heated by the direct application of a gas burner for evaporating the water contained therein and the atmosphere of steam thereby created in the receptacle heats the battery of pans suspended therein so as to evaporate the water contained in each of the pans.

In the form shown in the drawings, the improved apparatus comprises an evaporator or generator 1 communicating with a condenser 2 and a reservoir 3 which is adapted to receive the purified waterfrom the condenser.

The evaporator or generator 1 corn rises a cylindrical metal receptacle 4 having a cover member 5 which is provided with an inlet opening 6. The cover member is preferably soldered to the receptacle 4: and is nclined upwardly toward the central openlng. An upwardly extending annular flange 7 1s formed on the cover member adjacent the inlet and is flared so as to form a seat for a hollow plug 8 which is adapted to be removed in the operation of replenishing the evaporator. The walls of the plug 8 are incllned inwardly and downwardly so as to be adapted to fit in the seat formed by the flange 7. A nipple 9 is seated in an aperture formed in one side of the plug so as to communicate at its inner end with the interior of the receptacle. A flexible hose 10 1s secured at one end to the outer end of the nipple and is adapted to conduct the vapor from the evaporator to the con denser 2.

A battery-of pans 11 are suspended from the cover member 5 by a plurality of brackets 12, the upper ends of which are secured to the cover member by rivets 13 or other suitable fastening means. The pans are secured to the brackets so as to be arranged 1n spaced relation one above the other in axial alinement with the receptacle'l and in allnement with the inlet 6. The battery is disposed in spaced relation to the bottom and side walls of the receptacle and each of the pans 11 is larger in diameter than the successive pan above, so that the water in each pan is adapted to overflow into the next succeeding lower pan, and the water in the lowermost pan of the battery is adapted to overflow into the receptacle.

To replenish the evaporator when the plug 8 is removed from its seat, the water to be purified is poured through the opening 6 into the upper pan of the battery. The pouring is continued until all of the pans are filled and the water in the receptacle 1 reaches approximately the level shown in Fig. 1.

The condenser comprises a cylindrical receptacle 14 having a cover member 15 loosely supported thereon. The means for conducting the cold water or other cooling medium into the lower part of the condenser comprises a vertically disposed pipe 16, the lower or discharge end of which is located slightly above the bottom of the receptacle. A funnel 17 is secured to the upper end of the pipe 16 and is seated in anopening formed in the cover member 15 for supporting the pipe 'part'of the receptacle 14 and communicating at its upper end with the evaporator 1.

The fine comprises a pair of circular plates 22 and 23 disposedin substantially parallel spaced relation and connected by side walls 24. A pair of supporting brackets 25 are secured to the lower plate 22 for supporting the condensing chamber in its inclined position on thebottom of the receptacle 14." The plates 22"and 23 are of less diameter than the receptacle 14 so asto permit the cold water in the lower part of the, condenser to completely surround the condensing chamber. The upper end of the condensing chamber is-provided with a tubular extension 26 which is supported in an aperture formed in the walls of the receptacle 14. The outer end of the tubular extension 18 connected to i the hose 10 so as to provide communication between the evaporator! and the condensing chamber.

A plurality of partitions 27 are mounted betweenthe plates 22 and 23 and are alter-' nately connected to opposite sides of'the condensingchamber so as to form a tortuous passagefor the vapor passing therethrough. The partitions are disposed shown in Fig. 3 so that the space between the succes-' sive partitions is increased with the direc tion of flow through the condensing chamber. f A tubular extension 28 is secured to the lower end ofthe condensing chamber and is supported in an aperture formed in the walls of the receptacle 14. The outer end of the extension 28 is connected to. one end of a flexible hose 29 which communicates with the reservoir 3. The tubular extension 28 is inclined slightly in an upward direction so that a part of the water will be retained at the point of connection between the condensing chamber and the extension 28, thereby sealing the discharge end of the condensing chamber to prevent the escape or any vapor which has not been condensed.

' The'evaporating andcondensing receptacles are'shown in the drawings as being supported on a gas stove 30 which is provided with a burner 31 for heating the receptacle 4. i The condensing receptacle is shown as 32 supported resting upon an asbestos mat "on one end of the gas stove. The stove is supported on a table 33 having a bracket 34 for supporting the reservoir 3;

In operation when heat is applied to the bottom of the evaporator, the pans 11 will be heated by the vapor ascending from the water in the receptacle 4. The water in the receptacle 4 and in each of the pans 11 will evaporate at substantially the same rate and will pass through the hose 10 into the condensing chamber.

hen water in a receptacle is evaporated by the heat of a flame applied directly to the receptacle, the water is constantly in a state of agitation and therefore a great amount of impurities passes off with the steam into the condenser. In heating a'receptacle by an atmosphere of steam, instead of-by the direct application of a flame, the water is evaporated without any agitation and the percentage of impurities given off is reduced to a minimum. 1 Y

In the present invention the water in'the battery of pans is evaporated without any agitation by the atmosphere of steam created in the receptacle 4 and therefor the percentage of impurities which enters the condenser is considerably lower than it would be it evaporation took place from the outer receptacle alone.

The apparatus ing purposes, in which case the cover member 15 and pipe 16 are removed and the condensing receptacle 14 may then be filled with the liquid food which is to be cooked. The food in the receptacle 14 is heated by the steam which passes through the condensing chamber. 1Vhen using the device for cooking purposes, the hose 29 which communicates with the reservoir is disconnected from the condenser and a hose 35 leading to the receptacle 20 may then be connected to the tubular extension 28. When the apparatus is used for cooking purposes, the steam which passes into the condensing chamber at the beginning of the operation will be condensed and will pass through thc hose 35 into the receptacle 20. .The discharge end of the hose 35 is located sufiiciently close to the bottom of the receptacle 20 to be immersed inthe purified water passing from the condensing chamber. When the steam 'which'enters the condensing chamber has raised the temperature of the liquid food to a certain degree, condensation willnot takeplace until the vapor reaches the purified water in the bottom of the receptacle 20.

The device is especially adapted for-cooking soup and for preparing catsups and preserves which require long simmering. The temperature of the food is notraised suiiiciently to cause burning or boiling over so that constant stirring of the food while cooking is unnecessary.

Although but one specific embodiment of this invention has been herein shown and described, it will'be understood that numerous details of the construction shown may may alsojbe used for c0 0 k- V be altered or omitted without departing from the spirit of this invention as defined by the following claim.

I claim:

An evaporator comprising a receptacle having a cover member secured thereto, said cover member having an inlet opening formed therein, a battery of pans suspended one above the other in said receptacle with their centers in vertical alinenient with said opening, said battery being disposed in spaced relation to the closed bottom and side walls of said receptacle and to said cover member whereby said receptacle and pans are each adapted to contain water to be evaporated, each of said pans being larger than the successive pan above, whereby the water contained in each pan is adapted to overflow into the next lower pan, said receptacle being adapted to have heat applied thereto, said battery being adapted to be heated by the vapor generated in said receptacle for evaporating the water in said pans, and a plug detachably seated in said inlet opening and having a vent for conducting away the vapor generated in said evaporator.

JOHN H. DAVIS.

Signed at Chicago this 1st day of Dec. I 19. 

